Ngày tải lên :
28/11/2015, 15:35
... Ta cú: < x < x > x x 5x + 5x + = + V A = x x x x 0, 75 0, 25 0, 25 0, 25 0, 75 0, 25 0, 25 0, 25 0, 25 0 ,5 0, 25 0 ,5 0, 25 x 5( 1 x) x x 5( 1 x) + + = + +5 x x x x x x 5( 1 x) x 5( 1 x) + =2 Vỡ x x x ... y2018 l s chn Do ú: (2012x20 15 + 2013.y2018) l s chn m 20 15 L s l (vụ lớ) +) Nu y l s l thỡ y1009 l s l C 0 ,5 0, 75 0 ,5 0,25d 0, 25 0 ,5 0 ,5 0 ,5 0 ,5 0 ,5 0 ,5 0 ,5 0, 25 Do ú chn y1009 = (2n+1) (n ... 99 + 992) + + (50 + 51 ) (50 2 + 50 51 + 51 2) = 101(12 + 100 + 1002 + 22 + 99 + 992 + + 50 2 + 50 51 + 51 2) chia ht cho 101 Li cú: 3 (1) 0 ,5 3 A = (1 + 99 ) + (2 + 98 ) + + (50 + 100 ) Mi s hng...